[Si Coe]

Whilst thats a commendable ideal, there is a serious problem with adopting new classes and variants - namely numbers.
I once raced at a now defunct indoor club. On a typical race night might have heats for 1/12th, Recoils, TC's, Buggys and Micros. 5 heats, but in practice most only had 3-4 cars so thats actually only about 20 racers or 2 heats if they all ran the same class. And with so few drivers in a class there wasn't much competition, so numbers dropped further and the club closed.
There simply aren't enough numbers to support every possible niche - in fact there aren't really enough to fully support the mainstream! Its well known that 1/10th offroad and TC compete for drivers - a surge in popularity for TC results in a drop in OR numbers and vice versa.

The 1/8th world takes this very literally - one class, one engine size, one body style etc. But it makes the class one of the strongest and most enduring worldwide, because its not constantly being diluted by niche classes.